Question about Eclipse 87121.4 Car Speaker

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I need to know what the recomended box size in cubic feet for this sub

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1.1 cubic ft. sealed, 1.5 ported

Posted on May 24, 2013

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Posted on Jan 02, 2017

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SOURCE: sub box inner space measurements in inches

First off I have some questions to ask you? what size are your subs and what is the max power on them and the brand name?

Posted on Dec 21, 2007

etirbynnor
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SOURCE: I am building a custom box for 2 15 inch Kicker

Hello bgl6176,

According to their specs, the L7's will work in a ported enclosure with as little as 3 CuFt and up to 6 CuFt. Usually with ported, bigger is better, so let's use the 5 CuFt per chamber. I'm assuming that you have room for a 10 CuFt box in the trunk? That's a big box? Almost half as big as a medium sized refrigerator. I hope you don't plan on putting your golf bags in there too. For 10.15 CuFt, a box will need to be 36X29X20, allowing 0.15 for the partition, sub, and port displacement.

To tune each chamber to 30Hz, you need a 4" diameter port 4.6" in length. Lots of custom builders use PVC and even ABS pipe for round ports. You can also buy "pretuned" ports from sites like www.partsexpress.com.

You'll have to measure the exact room that you have available and then adjust the dimensions accordingly.

Here's a link to a great site for calculating almost anything in box building and subwoofer related. You can use the old "multiply LxWxD and divide by 1728" and the other formulas too, but here you can plug the figures in and immediately see the results.

http://www.the12volt.com/caraudio/boxcalcs.asp#rec

Hope this helps.

Posted on Oct 19, 2009

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Hi my name is alex and im building a speaker box and the specs that i have are 0.8cubic feet to 1.5 cubic feet. And the volume 1.4 cubic feet . gow can i convert this so i can use my tape measure


Hi Alex. The 3 measurements you quote are all cubic feet so you cannot ascertain any fixed sizes from that. The figure is arrived at by multiplying the width x height x depth. This means that if the box is 1 foot high and 1 foot wide it would need to be 1.4 feet deep to total 1.4 cubic feet. If it was 6 feet high and 1.4 feet wide and 2 inches deep it would also be 1.4 cubic feet. As you can see the sizes are completely different and the combination of different sizes is just about infinite.
Hope that is of some help, although to be honest I don't see how....

Regards
Steve

Jan 21, 2016 | Office Equipment & Supplies

1 Answer

How many cubic feet does this sub take in a vented box


for a single one in a sealed box should be looking at 5 Cuft not prted, it varies on the shape of the box, wedge, rectangle, etc and if its ported, 5 cubic feet is generalised in a rectangle box thats sealed, heres a link, it is a little difficult but once you work it out you can calculate the correct cubic feet for any sub in any shpaed box, check it out.

http://www.the12volt.com/caraudio/boxcalcs.asp#ser

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1 Answer

I need to know the demensions for 10 inch subs


almost any 10 will use .75 cubic feet up to 1.25 cu ft. thats about the size of a milk crate give or take. a sealed box will give you the cleanest tightest bass. A ported box will be louder but also larger at the cost of decreased power handling ability and sound quality. If your subs are designed for small enclosures use a sealed box around .75 to 1.00 cu ft.

Jan 30, 2010 | Koiiler XM-6715 Car Subwoofer

1 Answer

2 15" and a 10" sub


10" subs need 1 cubic feet. 15" subs need 2.5 cubic feet. install them on its own volume of the box...

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1 Answer

Sub box dimentions


12 " subs need 1.5 cubic feet sealed box...

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1 Answer

Box recomendations


It depends on the size of the subs- 8z 10z 12z 15z? whether or not you port the box is up to you- a ported box is generally louder than a sealed box -as you are coupling and tuning the sound from the rear of the driver with the sound generated from the front of the sub- but the box is also generally larger as well.Then aside from your preference of ported/sealed you have to account for the recommendations of the manufacturer as to whether the sub/speakers are meant to be placed in a ported or sealed enclosure. Most 10 inch subs do well in a box that yields .75 cubic feet to1.0 cubic feet.most 12z do well in 1.0 cu feet to 1.5 subic feet and 15z do well in 1.5 to 2.5 cubic feet. I have a set of 15z that require 4.25 cubic feet per sub-so its important to look into the manufacturers recommendations. The easiest box to make would be a sealed enclosure-and the sound quality generally yields a tighter more accurate bass sound along with increased power handling capability- try going to rockford fosgate .com and look into the woofer box wizard its a program that calculates air space for whatever size box you have room for-hope that helps you-good luck

May 11, 2009 | Car Audio & Video

1 Answer

What type of enclosure for audio bahn aw1000x


I used to be an Audiobahn dealer and can help you with the box. However I can't find specs on that model in my records or on Audiobahn's website. If you email me (dynami28@charter.net) the Theile Small parameters for the subs I can give you more exact specs. The box should be ported (Audiobahn doesn't recomend a sealded box) with about 2.5 cubic feet, made of 3/4" MDF. Here are some generic specs that should go well with that particular sub.

Air Space (Cu. Ft.) 2.4

Port Size (Inches) 4 x 6.25

Tune Freq. (Hz) 39

Mar 31, 2009 | AudioBahn AW1000X Car Subwoofer

1 Answer

Trying to find out wat the watts are on a jlw3 12 and a jlw0 12


The JL 12W0 needs 125 watts RMS. Sealed box it needs 1.5 cubic feet. Ported it needs 2.5 cubic feet.
The JL 12W3 needs 300 watts RMS. Sealed box it needs 1.25 cubic feet. Ported it needs 1.75 cubic feet. I wouldn't suggest running these subs together.

Jan 17, 2009 | Jl Audio 12W3 Car Subwoofer

1 Answer

What is the sealed and ported box volumes for the audiobahn dub 200 subs?


If you can access the inside of the sub box by removing the speaker, you may be able to measure the 3 dimension of each side of the enclosure.  1 cubic foot is 12x12x12 inches cubed.  That is 1728 cubic inches per cubic foot.  If you measure the inside dimensions of one of the enclosure sides as 10x14x8 inches, then that is 1120.  1120 divided by 1728 is 0.648 cubic feet.  Alternatively, you could estimate the volumes of each side of the box by measure the outside, figuring out where the box divider board is, subtracting the width of the boards used to make and then calculate.  Otherwise, I do not know the enclosure that that sub comes in.  Good luck.  Let us know how it goes.

Jan 02, 2009 | AudioBahn DUB200 Car Subwoofer

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